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You searched for: subject:"thoretical neuroscience"
[movies]Lars Kai Hansen: Cognitive Component Analysis - Redwood Center for Theoretical Neuroscience
Presentation given by Lars Kai Hansen of the Technical University of Denmark on January 22, 2009 to the Redwood Center for Theoretical Neuroscience at UC Berkeley. Abstract: Among the exponentially many ways of grouping data, can we characterize the ways that make sense to a human?. Cognitive component analysis is defined as the process of unsupervised grouping of data such that the ensuing group structure is well-aligned with that resulting from human cognitive activity...
Keywords: thoretical neuroscience
Downloads: 309
[movies]Nabil Bouaouli: Efficient sensory processing could depend on excitation/inhibition balance: A view from change detection - Redwood Center for Theoretical Neuroscience
Talk by Nabil Bouaouli of Ecole Normale Superieure, Paris. Given to the Redwood Center for Theoretical Neuroscience on March 10, 2009 at UC Berkeley. Abstract: The brain continuously processes the signals that emerge from the dynamic sensory environment. A well admitted view about the strategy applied by the nervous system is that it analyses the “sensory scene” as an ensemble of basis features which constitute the signal (e.g...
Keywords: thoretical neuroscience
Downloads: 306 4.00 out of 5 stars4.00 out of 5 stars4.00 out of 5 stars4.00 out of 5 stars(1 review)
[movies]Angela Yu: Sequential Effects: Irrational Superstition or Adaptive Behavior? - Redwood Center for Theoretical Neuroscience
Talk by Angela Yu of UC San Diego. Given March 17, 2009 to the Redwood Center for Theoretical Neuroscience at UC Berkeley. Abstract: Just as visual illusions reveal principles and mechanisms underlying natural visual processing, "cognitive illusions" can provide similar insight into the computations underlying decision-making. In a variety of behavioral tasks involving randomized sequences of stimuli, subjects exhibit an odd "sequential effect": their responses are facilitated by chance runs of ...
Keywords: thoretical neuroscience
Downloads: 279
[movies]Laura Walker Renninger: Applying information models to explore eye movement behavior in patients with central field loss - Redwood Center for Theoretical Neuroscience
Talk given by Laura Walker Renninger of the Smith-Kettlewell Eye Research Institute in San Francisco. Given on April 9, 2009 to the Redwood Center for Theoretical Neuroscience at UC Berkeley.
Keywords: thoretical neuroscience
Downloads: 209
[movies]Risi Kondor: Visual Features from bispectral invariants - Redwood Center for Theoretical Neuroscience
First part of an informal talk by Risi Kondor, Gatsby Computational Neuroscience Unit, UCL (University College London). Given to the Redwood Center for Theoretical Neuroscience at UC Berkeley on December 18, 2008. Note: The last third of the talk (or so) was not recorded due to technical problems. Abstract: Invariance is a central problem in computer vision. Various systems of features are known which are invariant to translation, rotation, scaling, etc...
Keywords: thoretical neuroscience
Downloads: 123
[movies]Alex Pouget: Probabilistic inferences in neural circuits: from insects to humans - Redwood Center for Theoretical Neuroscience
Talk given by Alex Pouget of the Department of Brain and Cognitive Sciences, at the University of Rochester. Given on May 6, 2009 to the Redwood Center for Theoretical Neuroscience at UC Berkeley. Abstract. A wide range of behaviors can be formalized as instances of probabilistic inferences. This includes odor recognition in insects, navigation in rodents, auditory localization in barn owls, decision making in primates and causal reasoning in humans, to name just a few...
Keywords: thoretical neuroscience
Downloads: 554
[movies]Susana Martinez-Conde: Perceptual and physiological effects of fixational microsaccades - Redwood Center for Theoretical Neuroscience
Talk by Susana Martinez-Conde of the Barrow Neurological Institute, Phoenix, Arizona. Given on March 25, 2009 to the Redwood Center for Theoretical Neuroscience at UC Berkeley. Abstract. A large part of our visual experience is driven by the eye movements we produce while we fixate our gaze. Therefore the perception and physiology of fixational eye movements are critical to our general understanding of vision...
Keywords: thoretical neuroscience
Downloads: 225
[movies]Surya Ganguli: Origins of short-term memory traces in neuronal networks - Redwood Center for Theoretical Neuroscience
Talk by Surya Ganguli, UCSF, to the Redwood Center for Theoretical Neuroscience. Given on May 13, 2009 at UC Berkeley. Abstract. Critical cognitive phenomena such as planning and decision making rely on the ability of the brain to hold information in working memory. Many proposals exist for the maintenance of such memories in persistent activity that arises from stable fixed point attractors in the dynamics of recurrent neural networks...
Keywords: thoretical neuroscience
Downloads: 377
[movies]Jonathan Victor: Understanding the Computations in Primary Visual Cortex: Does Tweaking the Standard Model Suffice? - Redwood Center for Theoretical Neuroscience
Talk given by Jonathan Victor, Cornell University on May 27, 2009. Given to the Redwood Center for Theoretical Neuroscience at UC Berkeley. Abstract: A central problem in systems neuroscience is to understand the nature of cortical computations, and how they are implemented. Primary visual cortex is an excellent model system for addressing these questions, since its inputs are readily controlled and its anatomy is well-understood...
Keywords: thoretical neuroscience
Downloads: 301 (1 review)
[movies]Francois Meyer: From fMRI to Behavior and Back: The Decoding of fMRI Datasets - Redwood Center for Theoretical Neuroscience
Talk given by Francois Meyer of the University of Colorado at Boulder on December 17, 2008 at the Redwood Center for Theoretical Neuroscience at UC Berkeley. Abstract: Functional Magnetic Resonance Imaging can be used to infer subjective experience and brain states of subjects immersed in "natural environments". These environments are rich with uncontrolled stimuli and resemble real life experiences...
Keywords: thoretical neuroscience
Downloads: 235
[movies]Jonathan Pillow: Understanding stimulus coding and correlation in large neural populationsUnderstanding stimulus coding and correlation in large neural populations - Redwood Center for Theoretical Neuroscience
Talk given by Jonathan Pillow of the University of Texas at Austin. Given to the Redwood Center for Theoretical Neuroscience at UC Berkeley on May 20,2009. Abstract. One of the central problems in theoretical neuroscience is to understand how ensembles of neurons convey information in their collective spiking activity. Correlations, or statistical dependencies between neural responses, can affect both the amount of information carried by population responses and the manner in which downstream br...
Keywords: thoretical neuroscience
Downloads: 317
[movies]Urs Koster: Learning Natural Image Structure with a Horizontal Product Model - Redwood Center for Theoretical Neuroscience
Talk by Urs Koster, Dept. of Computer Science, University of Helsinki; given to the Redwood Center for Theoretical Neuroscience on March 5, 2009 at UC Berkeley. Note: Slides for this talk (PDF format) can be downloaded by clicking on the "All Files" link on the left. Abstract: We present a novel extension to Independent Component Analysis (ICA), where the data is generated as the product of two submodels, each of which follow an ICA model, and which combine in a horizontal fashion...
Keywords: thoretical neuroscience
Downloads: 209
[movies]Werner Callebaut: Beyond reduction and emergence - Redwood Center for Theoretical Neuroscience
Talk given by Werner Callebaut, of the Konrad Lorenz Institute for Evolution and Cognition Research, Austria. Given to the Redwood Center for Theoretical Neuroscience at UC Berkeley on April 1, 2009. This is the first of two talks given by Werner to the Redwood Center on that day. Abstract: The positivist unity of science program resulted, somewhat paradoxically, in an anti-reductionist consensus in the philosophy of biology that resonated with postmodernist calls for disunity...
Keywords: thoretical neuroscience
Downloads: 361
[movies]Ben Torben-Nielsen: Function shapes structure: Results from optimizing model neurons for performing particular functions - Redwood Center for Theoretical Neuroscience
Talk by Ben Torben-Nielsen of the Okinawa Institute of Science and Technology; given on March 6, 2009 to the Redwood Center for Theoretical Neuroscience at UC Berkeley.
Keywords: thoretical neuroscience
Downloads: 200
[movies]Pierre Garrigues: Inference and learning of higher-order structure in sparse coding models of natural images - Redwood Center for Theoretical Neuroscience
Thesis seminar given by Pierre Garrigues, a graduate student in the Redwood Center for Theoretical Neuroscience at UC Berkeley. Given on April 10, 2009 at UC Berkeley. Abstract: Natural images, as complex and varied as they appear, have a sparse structure. That is, one can learn a basis set such that only a small fraction of the basis functions is necessary to describe a given image. Computing the sparse representation can be achieved by solving l1-regularized least-square, a problem commonly re...
Keywords: thoretical neuroscience
Downloads: 235
[movies]Nihat Ay: Causality, Information Flows, and the Perception-Action Loop - Redwood Center for Theoretical Neuroscience
Talk given by Nihat Ay, of the Max Planck Institute for Mathematics in the Sciences, Leipzig, Germany and the Santa Fe Institute, New Mexico. Presented to the Redwood Center for Theoretical Neuroscience on December 19, 2008 at UC Berkeley.
Keywords: thoretical neuroscience
Downloads: 150
[movies]Thomas Serre: Mechanisms of bottom-up and top-down processing in visual perception - Redwood Center for Theoretical Neuroscience
Presentation given by Thomas Serre of MIT on April 22, 2009. Given to the Redwood Center for Theoretical Neuroscience at UC Berkeley. Abstract. Perception involves a complex interaction between feedforward sensory-driven information and feedback attentional, memory, and executive processes that modulate such feedforward processing. A mechanistic understanding of feedforward and feedback integration is a necessary step towards elucidating key aspects of visual and cognitive functions and dysfunct...
Keywords: thoretical neuroscience
Downloads: 847
[movies]Mike DeWeese: One Physicist's View Of The Cerebral Cortex - UC Berkeley Physics Dept.
Talk by Mike DeWeese, of the Department of Physics and the Redwood Center for Theoretical Neuroscience (part of the Helen Wills Neuroscience Institute) at UC Berkeley. Given at the UC Berkeley Physics Colloquium on April 27, 2009. Abstract. Our brains are capable of solving many challenging real-world problems, such as focusing on one voice out of many at a loud cocktail party, navigating through a busy city intersection, recognizing a familiar face, and so on...
Keywords: thoretical neuroscience
Downloads: 489
[movies]Chris Moore: T Cortical Dynamics and Perception - Redwood Center for Theoretical Neuroscience
Talk by Chris Moore of MIT on June 1, 2009. Given to the Redwood Center for Theoretical Neuroscience at UC Berkeley. Abstract. Our laboratory studies how rapid changes in neural organization, on the time scale of milliseconds to seconds, shape perception. Our key model system is the primary somatosensory cortex (SI), with a strong emphasis on the vibrissa 'barrel' cortex. In human MEG studies of tactile detection, we have shown that dynamics in the SI evoked response predict detection (Jones et ...
Keywords: thoretical neuroscience
Downloads: 350
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